Sliding grate for ovens



May 3,1927. 1,627,405

A. E, M. PRENVEILLE ET AL SLIDING GRATE FOR OVENS Filed Aug. 4. 1924 gw@ uw ATTORNEY Patented May, 3, 1927.

UNITED STATES- 1,621,405 PATENT OFFICE.

ANTOINE E. M. PRENVEILLE ANP DONALD E. PRENVEILLE-OF OAKLAND, CALIFORNIA.

SLIDING GRATE FOR OVENS.

Application tiled August 4, 1924. Serial No. 729,945.

Our invention relates to sliding ovengrates of the type which are arranged to be drawn outwardly vfrom or replaced in the oven by the opening or closing movement of the. oven-door.

An object of the invention is to provide means entirely controlled by the oven-door handle for permittingy the grate to remain within the oven or caused to be withdrawn ,10 from the oven by the movement of the ovendoor when the latter is opened.

Another object of the invention is to provide grate supporting means which will y effectively sup ort the grate in al1 of the extended positions thereof. and which will be fully ,concealed within the oven when the grate is entirely drawn back therein.

The invention possesses other objects and features of advantage some of which with the foregoing'will be set forth in the following description. of the preferred form yof our invention which is illustrated in the drawings accompanying and forming part of the specification. It yisto be understood however, that we do not limit ourselves to the showing made by the-said drawings and description as we may adopt variations of the preferred form within the `scope of our invention as set forth in the claims.

Referring to saiddrawings: Figure 1 is a vertical sectional view thru an oven equipped with the grate of our 1nvention, the grate being-shown entirely within the oven, and the door being shut.

Figure 2 is av'ew similar to Figure 1,

lyshowing the door fully opened, and the oven in extended l osition.

Figure 3 is a p an view of a portion of the inner side of the door-.in extended position showin the door connecting and releasing means or the grate.

Figure 4 is a sectional view on the hne 4 4 of Figure 1.

As illustrated in the drawings` the device of our invention is associated with an oven 4 of a design such as is usually incorporated in stoves and ranges. The opening 5 at the frontl of the oven is arranged to be closed by a suitable door 6 hinged to swing about a horizontal pivot 7 preferably .located in a plane just below the bottom S of the oven and forwardly of the plane of the opening 5. The door is arranged to swingoutwardly and downwardly to the position indicated in Figure 2 and is provided with a handle 9 tion and are arranged to fit within the channel of the guideways.

Preferably of a length slightly less than the depth of the oven is a grate member 17 which, as here shown. is in the form of a grate rack or holder. For convenience, however, the member 17 will be hereinafter referred to as the grate, it being further understood that said member may be in the form of an oven bottom or other equivalent member on which articles within the oven may be supported. The grate, adjacent its bottom` is preferably provided with bars 18 which are arranged to slidably fit in the channels of the movable tracks 16. The bars 18. tracks 16 and guideways 14, are preferably of about the same length as the grate,

and the two first mentioned members are preferably adapted to fit practically entirely within the guideway when the grate is completely within the oven. On the other hand. when the grate is drawn outward from the oven the track and bars are arranged to move outwardly from the guideway. Furthermore, the bars may move outwardly from the track, and in this manner, by properly limiting the outward movement of the bars with respect to the track and, lim- Iiting the outward movement of the latter with respect to the guideways, the grate may be effectively supported in a position practically on the outside of the oven, since in effect the track thus serves as a cantilever support. In accordance with the foregoing. the bar 18 is preferably provided with a stop 19 which is arranged to engage a cooperating stop 21 formed at the forward edge of the track when the grate has lbeen moved to a position about half way out on i0 the track; in addition, the track is preferably provided at its rear edge with a stop 22 which is arranged to engage a shoulder 23 preferably provided mediately of the, guideway. p

Means, arranged to be controlled entirely mg movement of the door to effect an, out

' ward or inwardmovement of the grate relay drawn `from the oven.

tive to the oven. Pivoted to vthe frame piece just above yand inwardl of lowerv forward edge of thel oven is a bel -crank lever-24, one :arm 25 of which is arranged to extend upwardly along the inner side of the door when the grate is retract-ed and the door is closed,

while the other a'rm 26 is arran ed to extend inwardly into the oven substantlally arallel to thevbottom thereof.- rIhe inner en of .the

arm 2.6 lis attached, by 'means of a pin and slot connection, to a link 28 `which is pivoted vto a lever 29 `fulcrumed to `the 'frame piece adjacent the rear wall 30 of the oven. The lever 29 .is connected to a lever 31 by means of a llink 32, the lever 31 being pvoted at one end tothe frame piece at a point adjacent the top of the oven mediately of .the front and rear thereof, and the other end being pivoted toa link 33 which is attached to the grate at the `lower forward edge thereof.

It will now be noted that by swinging the lever arm 25 outwardly to assume the horizontal position, as indicated in Figure 2, the grate will be caused to move from a fully retracted position to an extending position wherein it is practicallyT completely with- It vwill furthermore be noted that with the lever system as illustrated, the lever 25 will move `through an v yangle of from its vertical position before appreciable outward movement of the grate is-elfected; Reversal of the movement `of the lever, 'that 'is from the lower to the upper l position, will obviously cause the ,above described actuation of the order.

As previously mentioned, the vforegoing ymeans for moving the grate i'sarranged to be grate in the 4reverse actuated bythe movement of fthedoor and controlled by appropriate manipulation of vthe door handle. Slidably .mounted in bearings 34 provided on the inner side ofthe door adjacent the top edge 35 is a bolt .member 37 havin catches y38 provided thereon `and ar- `range to beca-used to engage extensions 39 provided on thejfree Yends of the lever arms 25. When the door is vertically disposed,

or,in other words, vin closed position, the catches 38, due to the 'weight of the bolt, will lie in depressed position and thus be out of engagement with the extensions 39 of the lever 25. "With the members thus disposed, movement of the door will in no way effect the grate. However raising of the bolt, it will benoted, will'serve to -eitect the opera- -tive enga-gement of the catches with the i lever 25, and `thus y cause the before described movement of `the lgrate 'upon movement of the door. As here shown, the raising of. the bolt is arranged to be effected by rotating the grip portion 12 of the handle. The grip is mounted for manual rotation about a a pair of fingers 42 which are arranged to extend through vslots 43 provided in the door and to engage the under side of the bolt. In this manner, by merely grasping the grip and Islightly rotating .the same to raise the lingers, the catches will engage the extensions, and movement of the door will then cause the movement of the grate.

Owing to the fact that the pivotal axes of the oven door and the bell crank lever 24 .are spaced, they preferably, and as here shown, definev ya .plane making an angle of substantially 45 ldegrees with the oven bottolnwhereby the lcver arm 25 may maintain a nearly parallel relation to thel door when swungtherewith in the manner indicated and `ma be parallel thereto when the door isclose or fully open. Owing to the foregoing relation ofthe pivotal axes of the door and lever, it` will now be clear that as the door is o ened with the extensions 39 engaged in ront ofthe catches 38, the arms 25 and their extensions 39 will move radially inwardly along the door and so fix the arms to the door independently of a-nyzmanipulation of the door handle. In this manner, the door handle need be manipulated and held to dispose the bolt catches 38 behind the extensions 39 only at the beginning of -the opening operation, since an automatic into and out of said oven, means arranged to be connected to the door and grate to cause the grate to be moved out of and into the oven upon the' opening and closing movement` of the door, a handle for said door comprising a bracket positioned on the outer side of the door, a grip member supported by said bracket for rotation about an axis parallel to the plane-of said door, and an arm extending through the door and movable upon rotation of said grip member tovconnect said means to the door or disconnect same therefrom.

2. In `combination with an oven and a door therefor, a grate member slidably mounted in said oven for rectilinear movement therein and arranged to be moved to and be supported in a position substantially entirely outwardly therefrom, means arranged to be `actuated by theopening and closing movement of the dodr for slidingl said grate respectively out of and into the oven, portions of said grate operatingy means being movable relative to the door and arranged to lie outwardly of saidoven when said door is in intermediate and fully opened positions and to be maintained in substantially parallel relation to said door.

3. In combination Wit-l1' an oven and a door therefor, a grate member mounted to slide into and out of said oven,'a'be1lcrank level' mounted in said oven and having an tarmreleasably secured to said door and ara ranged to extend outwa'dly of said oven-v lation to said door, and means o e'ratively v connecting the other arm of sai lever to said grate whereby the grate may be moved .out of and into the. oven upon the opening and closing movementof 'the door.

In testimony whereof, We have hereunto set our'hands at Oakland, California, this 1st day of July, 1924.

' ANTOINE E.. M. PRENVEILLE. DONALD E. PRENVEILLE. 

